She was so amused with the magician’s tricks that she a smile.
A. burst out
B. burst into
C. burst forth
D. burst in
网友回答
A. burst out
(答案→)B. burst into
C. burst forth
D. burst in
解析：考查词组：句意：她对魔术师的魔术感到如此好笑以至于她突然笑起来了。Burst out doing和burst into sth突然…，burst forth产生，burst in突然闯入，选B。